• 文献标题:   Morphology evolution of a thermotropic liquid-crystalline polymer in a polyamide 6,6 matrix regulated by graphene
  • 文献类型:   Article
  • 作  者:   WANG MM, XIN YS, SU C, XUE F, XU FL, LI TS
  • 作者关键词:   graphene fullerene, liquid crystal, morphology, nanotube, rheology, structureproperty relation
  • 出版物名称:   JOURNAL OF APPLIED POLYMER SCIENCE
  • ISSN:   0021-8995 EI 1097-4628
  • 通讯作者地址:   Fudan Univ
  • 被引频次:   1
  • DOI:   10.1002/app.43735
  • 出版年:   2016

▎ 摘  要

A two-step process, thermotropic liquid-crystalline polymer (TLCP) premixing with reduced graphene oxide (RGO) followed by blending with polyamide 6,6 (PA66), was used to prepare ternary TLCP/RGO/PA66 blends. The rheological behaviors, morphology, and mechanical properties of the blends were investigated. The results show that RGO migrated from the TLCP phase to the interface between the TLCP and PA66 phase during melt blending; this was due to a similar affinity of the RGO nanosheets to both component polymers. The dimensions of the dispersive TLCP domains were markedly reduced with the mounting RGO content; this revealed a good compatibilization effect of RGO on the immiscible polymers. The hierarchical structures of the TLCP fibrils were found in both the unfilled TLCP/PA66 blends and TLCP/RGO/PA66 blends. This supposedly resulted from the extensional and torsional action of unstable capillary flow. With the addition of RGO, the viscosities of the blends decreased further, and the fibrillation of TLCP and the mechanical performance of TLCP composites were both enhanced. (C) 2016 Wiley Periodicals, Inc.